Lewis Wickes Hine (1874–1940) was an American sociologist and
photographer. In 1908, he became the photographer for the National
Child Labor Committee, leaving his teaching position. Over the next
decade, Hine documented child labor in American industry to aid the
NCLC's lobbying efforts. Hine used his camera as a tool for social
reform. His photographs were instrumental in changing the Child
Labor Laws in the United States.

Photographs courtesy
of the Library of Congress - National Child Labor Committee Collection